diff --git a/util/local_database/cldr2qlocalexml.py b/util/local_database/cldr2qlocalexml.py
index 58ea21edabf..5b4a11c30d7 100755
--- a/util/local_database/cldr2qlocalexml.py
+++ b/util/local_database/cldr2qlocalexml.py
@@ -37,6 +37,9 @@ pass the path of that sub-directory to this script as its single
 command-line argument.  Save its standard output (but not error) to a
 file for later processing by ``./qlocalexml2cpp.py``
 
+When you update the CLDR data, be sure to also update
+src/corelib/tools/qt_attribution.json's entry for unicode-cldr.
+
 .. _CLDR: ftp://unicode.org/Public/cldr/
 """